Enable 3rd party support for Security Keys.

chrome/browser/resources/cryptotoken/cryptotokenapprovedorigins.js

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Provides an implementation of approved origins that relies
+ * on the chrome.cryptotokenPrivate.requestPermission API.
+ * (and only) allows google.com to use security keys.
+ *
+ */
+'use strict';
+
+/**
+ * Allows the caller to check whether the user has approved the use of
+ * security keys from an origin.
+ * @constructor
+ * @implements {ApprovedOrigins}
+ */
+function CryptoTokenApprovedOrigin() {}
+
+/**
+ * Checks whether the origin is approved to use security keys. (If not, an
+ * approval prompt may be shown.)
+ * @param {string} origin The origin to approve.
+ * @param {number=} opt_tabId A tab id to display approval prompt in.
+ *     For this implementation, the tabId is always necessary, even though
+ *     the type allows undefined.
+ * @return {Promise.<boolean>} A promise for the result of the check.
+ */
+CryptoTokenApprovedOrigin.prototype.isApprovedOrigin =
+    function(origin, opt_tabId) {
+  return new Promise(function(resolve, reject) {
+      if (!chrome.cryptotokenPrivate ||
+          !chrome.cryptotokenPrivate.requestPermission) {
+        resolve(false);
+        return;
+      }
+      if (!opt_tabId) {
+        resolve(false);
+        return;
+      }
+      var tabId = /** @type {number} */ (opt_tabId);
+      chrome.cryptotokenPrivate.requestPermission(tabId, origin,
+          function(result) {
+            if (result == 'ALLOWED') {
+              resolve(true);
+              return;
+            }
+            if (chrome.runtime.lastError) {
+              console.log(UTIL_fmt('lastError: ' + chrome.runtime.lastError));
+            }
+            resolve(false);
+          });
+  });
+};